One of those little dogs that rich/stupid owners carry around. Their little paws rarely touch the ground, except to take a poop.
"Good grief, look at Paris Hilton's airdog. Little bitch looks like a rat... and the dog looks pretty stupid too!"
by Rob Gilmore June 05, 2004
A hot dog bun with no hot dog, just the condiments.
A homeless guy asked me for a bite of my hot dog. I told him, "Sure man, but it's actually an air dog." To which he replied, "Man that's gross, I finna die!"
by emspin January 10, 2012